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Production process and application of small-section high-strength alloy steel welding product

A production process, high-strength technology, applied in welding equipment, laser welding equipment, metal processing equipment, etc., can solve the problem of damage to the welding point and the metallographic structure of the base material, unable to meet the requirements of product characteristics, brittle fracture and impact resistance, etc. The problem is to shorten the heat treatment time, solve the brittle fracture of the weld scar, and improve the tensile strength.

Active Publication Date: 2022-07-05
HANGZHOU FUCHUN SPRING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of insufficient solder joints of welding products of small and medium cross-section alloy steel and high-strength alloy steel in the prior art and the high power and For a long time, the depth of the decarburization layer of the workpiece welding point and the base material is high, thereby destroying the metallographic structure of the welding point and the base material, resulting in a decrease in tensile strength, easy brittle fracture and poor impact resistance. Unable to meet the characteristic requirements of the product and the problems of high production cost and low production efficiency

Method used

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  • Production process and application of small-section high-strength alloy steel welding product
  • Production process and application of small-section high-strength alloy steel welding product
  • Production process and application of small-section high-strength alloy steel welding product

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Embodiment 1

[0034] combined with figure 1 ~attached Figure 8 , In this embodiment, a production process for a small-section high-strength alloy steel welded product is proposed, and the process includes workpiece pre-forming, fiber laser welding, local rapid heat treatment, tempering and other processes; wherein the workpiece pre-forming process In order to cut high-strength alloy steel profiles near-line, and then pre-form the workpiece into a rectangular shape or a ring shape with unconnected ends by pre-forming equipment (such as lathes, stamping equipment or winding equipment); The local area of ​​the preformed workpiece to be welded is placed in the cleaning equipment through the fixture for local cleaning and cleaning to remove oil stains, rust or other impurities on the surface.

[0035] The fiber laser welding process is as follows: the partially cleaned preformed workpiece is dried by other drying methods such as air drying equipment, natural drying or low temperature drying. A...

Embodiment 2

[0039] combined with figure 1 ~attached Figure 8 , The difference between this embodiment and Embodiment 1 is that in this embodiment, the output power of the electrode heat treatment equipment is 3kw during local heat treatment, the local heat treatment time is 1.5~3s / piece, and the heat treatment temperature is set to 651~700℃ or 701~ 750℃, the distance of local heat treatment is set to 6~10mm or 11~30mm; it is also different from the tempering process, which adopts the local tempering process, and the local heat treatment equipment used is the same, which is different from the local heat treatment. The output of the electrode heat treatment equipment The power and the local tempering temperature are different, among which the output power of the local tempering treatment is 2kw; the local tempering temperature is 300 ~ 500 ℃.

Embodiment 3

[0041] combined with figure 1 ~attached Figure 8 , the difference between this example and Example 1 and Example 2 is that in this example, the output power of the electrode heat treatment equipment during local heat treatment is 6.5kw, the local heat treatment time is 1.5 ~ 3s / piece, and the heat treatment temperature is set to 500 ~800°C, the distance of local heat treatment is set to be 11-30 mm; this embodiment and embodiment 2 are also different from the tempering treatment process by adopting the overall tempering treatment process.

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Abstract

The invention discloses a production process and application of a small-section high-strength alloy steel welding product, and the process comprises the following steps: local rapid heat treatment: placing a welded semi-finished workpiece or finished workpiece on electrode heat treatment equipment, taking a welding point of the semi-finished workpiece or finished workpiece as a point A, taking a point A1 on the left side of the point A, and taking a point A2 on the right side of the point A; meanwhile, a point A2 is taken on the right side of the point A, the sum of the distance from A to A1 and the distance from A to A2 is the distance M of local heat treatment, an electrode of the electrode heat treatment equipment is connected with the point A1 and the point A2, local heat treatment is conducted after power-on, and heat treatment is completed after power-off; tempering treatment: after the local heat treatment is completed, the workpiece is put into tempering equipment for overall tempering or local tempering treatment of the workpiece; according to the small-section high-strength alloy steel welding product produced through the production process, metallographic structures of welding seams and a base material are not damaged, the tensile strength and the impact resistance are high, the problem of brittle failure is not prone to occurring, then the product quality is improved, and the service life of the product is prolonged.

Description

technical field [0001] The invention relates to the processing field of high-strength alloy steel welding products, in particular to a production process and application of a high-strength alloy steel welding product. Background technique [0002] High-strength alloy steel has a tensile strength of 1200-2000Mpa or even higher, so it is difficult to weld due to its own characteristics, especially the welding cross-sectional area is 0.5-20mm 2 Among the small-section alloy steel welded products, the welding difficulty will be higher, so the welding joints of the products are often not full, the tensile strength is not high, and the brittle fracture is easy. [0003] In the prior art, for example, in the production of small-section alloy steel welded wave springs, due to the small welding cross-section, after the overall heat treatment and tempering treatment of the welded wave spring in a resistance heat treatment furnace, the power and temperature during heat treatment are hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/24B23K26/60C21D9/50
CPCB23K26/24B23K26/60C21D9/50
Inventor 邵承玉
Owner HANGZHOU FUCHUN SPRING
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